/**
 * Created by LJY on 2017/3/11.
 */
public class test {
    public static void main(String[] args) {
        String name="yhzz";
        System.out.println(name);
        System.out.println(name.length());
        System.out.println(name.charAt(0));
        System.out.println(name.charAt(1));
        System.out.println(name.charAt(2));
        System.out.println(name.toUpperCase());
    }
}
